#Australia #quantum #batteries
"Now, researchers from Australia’s RMIT University and national science agency CSIRO have shown that a new method can extend the lifetime of quantum batteries by 1,000 times compared to previous demonstrations.
Quantum batteries are largely relegated to theory and lab experiments.
These devices use quantum superposition and interactions between electrons and photons, particles of light, to store and release energy. In theory, this could lead to batteries that charge extremely quickly and can even charge from ambient room light.
Conventional batteries, on the other hand, rely on chemical reactions to charge.
The new milestone, detailed in a paper published in the journal PRX Energy, is a step toward working quantum batteries.
'While we’ve addressed a tiny ingredient of the overall piece, our device is already much better at storing energy than its predecessor,' says co-author Daniel Tibben, a PhD candidate at RMIT.
Previous lab experiments of quantum batteries were plagued by rapid discharge where the batteries would leak stored energy almost as fast as the device charged.
Tibben and colleagues built 5 test devices which charged best when 2 energy levels inside atoms were aligned perfectly.
Their quantum batteries hold charge for microseconds (millionths of a second), or about a thousand times better than the nanosecond (billionth of a second) storage time of the previous record holding devices.
'While a working quantum battery could still be some time away, this experimental study has allowed us to design the next iteration of devices,' says co-author Daniel Gómez, a chemical physicist at RMIT. 'It’s hoped one day quantum batteries could be used to improve the efficiency of solar cells and power small electronic devices.'
'Australia is leading the way in experimental quantum battery research and this work is a significant advancement,' says co-author James Quach, Science Leader of CSIRO’s Quantum Batteries Team."
https://cosmosmagazine.com/science/engineering/quantum-batteries-last-longer/